package com.pe.rimac.database;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

public class RegistroSiniestroDBHelper extends SQLiteOpenHelper  {

	private static final String DB_PATH = "/data/data/com.pe.rimac/databases/";

	private static final String DB_NAME = "RegistroSiniestroDB";
	
	private static final String FILE_SQLITE = "db.sqlite";

	private static final int VERSION = 1;

	public SQLiteDatabase dataBase;

	private final Context context;

	public RegistroSiniestroDBHelper(Context context) {
		super(context, DB_NAME, null, VERSION);
		this.context = context;
	}

	public void createDataBase() throws IOException {

		boolean dbExist = checkDataBase();

		if (dbExist) {
			// do nothing - database already exist
		} else {

			// By calling this method and empty database will be created into
			// the default system path
			// of your application so we are gonna be able to overwrite that
			// database with our database.
			this.getReadableDatabase();

			try {

				copyDataBase();

			} catch (IOException e) {

				throw new Error("Error copying database");

			}
		}

	}

	/**
	 * Check if the database already exist to avoid re-copying the file each
	 * time you open the application.
	 * 
	 * @return true if it exists, false if it doesn't
	 */
	private boolean checkDataBase() {

		SQLiteDatabase checkDB = null;

		try {
			String myPath = DB_PATH + DB_NAME;
			checkDB = SQLiteDatabase.openDatabase(myPath, null,
					SQLiteDatabase.OPEN_READONLY);

		} catch (SQLiteException e) {

			// database does't exist yet.

		}

		if (checkDB != null) {

			checkDB.close();

		}

		return checkDB != null ? true : false;
	}

	/**
	 * Copies your database from your local assets-folder to the just created
	 * empty database in the system folder, from where it can be accessed and
	 * handled. This is done by transfering bytestream.
	 * */
	private void copyDataBase() throws IOException {

		// Open your local db as the input stream
		InputStream myInput = context.getAssets().open(FILE_SQLITE);

		// Path to the just created empty db
		String outFileName = DB_PATH + DB_NAME;

		// Open the empty db as the output stream
		OutputStream myOutput = new FileOutputStream(outFileName);

		// transfer bytes from the inputfile to the outputfile
		byte[] buffer = new byte[1024];
		int length;
		while ((length = myInput.read(buffer)) > 0) {
			myOutput.write(buffer, 0, length);
		}

		// Close the streams
		myOutput.flush();
		myOutput.close();
		myInput.close();

	}

	public void openDataBase() throws SQLException {

		// Open the database
		String myPath = DB_PATH + DB_NAME;
		dataBase = SQLiteDatabase.openDatabase(myPath, null,
				SQLiteDatabase.OPEN_READWRITE);

	}

	@Override
	public synchronized void close() {

		if (dataBase != null)
			dataBase.close();

		super.close();

	}
	
	/*public Cursor getLista(String tabla, String idColumna, String descripcionColumna, String where, String[] args)
	{
		openDataBase();
		return dataBase.rawQuery("SELECT "+idColumna+" as _id, "+descripcionColumna+" from "+tabla + " " + where,args);

	}
	
	public Cursor getLista(String tabla, String idColumna, String descripcionColumna)
	{
		return getLista(tabla, idColumna, descripcionColumna, "", new String[] {});

	}*/

	@Override
	public void onCreate(SQLiteDatabase arg0) {
		
	}

	@Override
	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
		
	}

	public SQLiteDatabase getDataBase() {
		return dataBase;
	}

}
